Grinding machine



NW, 9 smwm H. LUTZ GRINDING MACHINE Filed Aug. 30. 1920 2 Sheets-5heefi1 ENTOR. Hans Lutz 1/1, 4;

H. LUTZ GRINDING MACHINE Filed Aug. 30. 1920 2 Sheets-Sheet 2 INVENTOR.Hans Lutz I I I: l n v l grinding rollers either tapered type.

- Patented Nov. 25,1924.

HANS-LUTZ, or ELMIRA, NEW vonmnssrenon' TO THE WILLYS-MORROW COMPANY,

' OF ELMIRA, NEW YORK, A CORPORATION OF OHIO.

GRINDING nacrmm.

Application fifleii August 30, 1920. Serial No. 406,969.

To all whom it may concern:

Be it known that I, HANS .lJUTZ, a'citizen of the United States,residing at' Elmira, county'of Chemung, State of New York, have inventedcertain new -and useful Improvements in Grinding Machines, of which Ideclare the following to be a full, clear, and exact description. 1

The present invention relates to grinding machines and is particularlyadapted for of the stra ght or The construction of the. present machineis similar-in some respects to the machines shown and described in myco-pending applications filed May 29, 1920, and bearin Serial Numbers300,712 and 300,713, and the improvements-herein relate moreparticularly to the mechanism employed for supporting and retaining thework as well as in the manner ofmounting and moving the upper and lowermembers between which the objects are ground.

One object of the invention is to provide an im roved machine of thecharacter describe which is of. simple construction and eiricient inoperation. A further object of the invention is to provide a pair ofeccentrically mounted and driven members which.are adapted to contact.with the opposite sides of the objects to be ground with improved meansfor retaining saidobjects between said members.

I. A further object of the invention is-to provide improved mechanismparticularly adapted for grinding tapered rollers comj which is adaptedto carry v to theprovislon of improved instrumentali-I prising upper andlower members, one of a work retaining member and to move it in a patheccentric to the path of movement of the opposite membe Further objectsof .the invention relate ties and devices for securing a properoperation of the variousmechanisms em loyed to effect the grinding ofthe work 1n the most proficient and economical; manner.

The objects of the inventionfare accomplished in'one instance by thedevices and means described in the following specification,' but it isevident that the same may be varied without departing from the scope aspointed out .in. the ap-' of the invention pended, claims.

"A' structure constituting one embodiment posite directions at differentratesother. It will be llustrating a slightly modified form of theinvention.

Like reference characters throughout the several views of the drawingsindicate corresponding parts;

It has been found desirable in providing mechanism for properly ishing'the outer surfaces of the rollers to employ a pair of eccentricallymounted and oppositely driven rotating members and it is also founddesirable to rotate them in opof speed in such a manner as tobear'against the opposite surfaces of the rollers to be ground orpolished and in thus performing the grinding and polishing operation-theuniformity and precisionof the finished product is found to be greatlyincreased. By providing means upon one of said members for suitablyretaining the rollers or work in position between the same the number ofparts of. the machinp is considerably reduced and the shifting orsliding of the .work is eflected by the eccentric mounting: of saidmembers, one with respect to the bers in opposite directions atdifferent rates of speed. Themovement thus imparted to; the rollers willinsure the forming of the outer surfacesthereof a uniform mannergrinding and pol-,

as readily understood upon to produce a smooth and perfectly formedsurface upon each roller.

' In the embodiment of-the invention illustrated herewith 1 indicates abase frame in the form of a casing provided with an offset outwardlyextending arm 2 which is adapted to support the bearing sleeve 3positioned in alignment with a similar carried by the main portion ofthe frame and a shaft 5 is rotatably supported by said bearin s andextends within the inner portion the base frame for a purpose to behereinafter described. Positioned above the shaft is a bearing sleeveably supported by the main frame portion 1 and the bearing 6 supports arotatable shaft 7 having one end thereof extendin within the interiorportion of the casing. 5

drive pulley 8 of the usual construction is.

mounted upon and firmly secured to the shaft 5 in such a manner as toimpart rotation thereto through the usual driving belt (not shown). Anidler pulley 9 of the same diameter as the pulley 8 is mounted adjacentthe pulley 8 in such a manner as to permit the driving belt to be forcedthereon when for any reason it is desired to disconnect the operatingparts of the mechanism from the power belt. Secured to the shaft 5 inany desired manner is a gear 10 which is adapted to mesh with a gear 11firmly secured to the outer end of the shaft 7 in anypreferred manner.The gears 10 and 11 are of different sizes and while in the embodimentillustrated herewith the gear 11 is of larger diameter than the gear 10,it is to be understood that the gears may be removed and otherssubstituted therefor so as to increase or decrease the relativedifference in sizes of the gears as shown, or the gears may betransposed so that the gear carried by the shaft 5 will be of greaterdiameter than the gear carried by the shaft 7. By forming the gears 10and 11 of different diameters, gears 12 and 14 being equal and gears 13and 15 being also equal, one of the members between which the work isdisposed is driven at a greater speed than the other, thus imparting tothe work retaining'member a rotating movement. Mounted upon the innerend portion of the shaft 5 is a bevelled gear 12 which is connected witha bevelled gear 13 for rotating the upper grinding member while in asimilar manner the bevelled gear 1 1 is mounted upon the inner end ofthe shaft 7 and is connected with the bevelled gear 15 for rotating thework supporting member. By reason of the fact that the shafts 5 and 7rotate in opposite directions, rotation will be imparted to the upperand lower work engaging members in such a manner as to rotate the samein opposite directions. Means for raising and lowering the verticalshaft 16 and the parts superimposed thereon which are driven bearingsleeve 4 6 which is suitiotherwlse connected therewit by the gear 13 is"shown in the lower part of "the casing beneath said gear 13 but as thismechanism has been previously described in one of my co-pendingapplications above referred to, it is not believed to be necessary togive a detailed description of the same in the present application. Thebevel gear 15 is firmly secured to the lower end portion of a sleeve 17which-is rotatably mounted within the upper portion of the frame andsaid sleeve has firmly secured to the upper end thereof an eccentric 17'disposed within the .hub 18 of a dished-plate 18 which is rotatablysupported by the bas frame through the anti-friction bearings 19 and 20,the latter of which is eccentrically mounted with respect to the former,

said bearings being separated by .a plate 21 having recesses in itsupper and lower faces to receive said bearings as indicated in Figure I.The bearing in addition to being eccentric to the bearin 19- is alsoeccentric to the shaft 16. The dished plate 18 which is supported by theanti-friction bearings 19 and 20 and driven by the sleeve 17 carries aring 22 upon which is mounted an annular member 23 which is threadedexternally at 2 1 to receive a ring 25 for supporting a plurality ofrollers 26 provided with ball bearings 27 supported by a shaft 28 whichis screw threaded at 29 into the ring 25 as indicated in Figure 111. Theroller 26 and bearing 27 is held upon the shaft by means of a plate 30lying within the recessed portion 31 of the roller, said plate beingsecured by means of a'stud 32 screwed into the outer end of the shaft28. The ring 25 is preferably split as indicated at 33 and is providedon its adjacent ends with lugs 34 adapted to receive the adjusting screw35 for tightening the ring upon the annular member 23. Positioned uponthe upper surface of the annular member 23 is a remorable ring 36, theupper surface of which is in one embodiment of the invention inclined asindicated at 37 a suflicient amount to bring the upper surface of thetapered :oller 38 in parallel relation with the horizontally disposedgrinding surface 39 of the grinding ring 40 which is suitably connectedwith and driven by a plate 41 connected with the dished plate 12supported upon and driven by the upright shaft 16 by being keyed or Asuitable number of weights 43, 44 and 45 are super imposed upon the dishshaped plate 412 to cause the grinding ring or member 40 to be heldfirmly in contact with the rollers to be ground which travel upon andare supported by the lower work carr ing ring as shown in Figures 111and IV. retaining ring 46 is provided for holding the rollers in properposition between the grinding ring 40 and supporting ring '36, saidretaining ring being held against displacement by the flanges tionbearing 52 in the form o 47 on the sup rting rollers 26 as indicated 49is formed within the supporting ring 36- beneath th rollers 38 toreceivesuitable ma-' terial for lubricating the rollers durin grinding. Thetapered rollers 38 are 'held against lateral movement upon the supportmgring 36 by means of the retaining ring 46 but are constantly movedlaterally upon the grinding surface 39 of the upper grindingring 40 byreason of the fact that the supportmg ring 36 is eccentrically mounted.Since the tapered rollers38 are carried upon thebevelled or inclinedsurface '37 of the supporting ring 36, 'the upper surfaces of saidrollers are at al times arallel with the horizontally disposed grin ingsurface 39 of the ring 40,- thereby assuring the grinding of the rollersto the proper'ta r, which is maintained by previously grin ing thesurface 37 of the supportm ring 36 at the proper predetermined ang e tosuit the taper of thefrollertobe ground.

In the modification shown in Figure IV the rollers 50 for supporting theretaining ring 46 are made adjustable to be moved up and down forraising and lowering the retaining ring to take care of rollers ofdifl'erentsizes, said adjustment being effected by making the shaft 51carryin the anti-frica crank shaft, the outer portion being eccentric tothe stud portion 53, said stud extending through and being clampedupon-the retaining ring 54 b means of the nut 55 which when loosenedwill permit the shaft 51 to be rotated sofas 'to either elevate or lowerthe roller 50 according to whether it is desired to raise or lower theretaining ring 46. 'When the roller 50 has been moved to the desiredposition the nut 55 is tightened to clam the roller upon the ring 54.

recess 56 thereof by means of the by means of the stud 58, said partsbeing constructed in a similar manner to the corresponding parts shownin Figure III. In this modification I have shown the upper surface ofthe work supporting ring 59 parallel with the lower surface of the ring40 to accommodate the rollers 60 having straight sides.

It will be apparent to those skilled in the art that the invention shownand described erein is susceptible to various modifications, embodimentsand arrangements to suit special or varying conditions and I- wish it tobe understood that the terms which I have used are merely descriptiveand not limiting and that it is my intention to include any being freeto rotate withem, a frame, a grinding ring,

The anti-frlction bearing 52 of the roller is held within the and allmodifications which come within the scop (if theinvention as defined inthe appended claims.

JVhat I claim as by Letters Patent is:

1.In a grinding machine for tapered rollnew and desire to cover a rollersup- I porting ring, means for mounting said rings on said frame torgvolveabout a common g axis, one of sand rings being arrangedeccentrically-to said axis, and means" carried by said supporting ringfor assisting it to move the rollers across the face of said grindingring when said supporting ring is rotated.

2. In a grinding machine for tapered rollers, a frame, upper and lowereccentrically mounted members carried by said frame, be-

tween which said rollers are disposed, one of said members having. aninclined surface forming'a seat for the rollers, a retaining ring havingrecesses in which said rollers are disposed and a series of supportingand guiding rollers for said retaining ring having vertical flangesadapted to prevent dis: placement of the retaining ring.

3. In a grinding machine for tapered roll-l ers, a frame, upper andlower eccentrically' mounted mem of said members having an inclined faceforming a seat tati ng said members in opposite directions, a retainingring for the rollers and a series of supporting and guiding rollers forsaid ring placement of the ring. 4. In a grinding machine for taperedrollers, a frame, upper and lower rings carried by said frame betweenwhich the rollers are disposed, one of said rings having an inclinedsurface forming a seat for the rollers, means for rotating the rings atdifferent rates of speed, a freely rotatable ring serving to hold therollers between said rings and supporting means for said last merrvtioned ring located outside of the path of movement of said first rings.

5. In a grinding machine for tapered roll: ers, a frame, upper and lowerrotatable annular members carried by said frame, between which therollers are disposed, one of said members being eccentricaily mountedrelative to its axis an inclined surface forming a seat fbr the rollers,means for imparting movement to said one member and freely rotatablemeans supported :exteriorly of said upper and .lower members forretaining the rollers in ported by said frame, upon the adjacent facesof which the rollers are disposed, one

having flanges adapted to prevent disrs carried by said frame, one

for the rollers, means for roof rotation and having 1 of said facesbeing inclined with respect to-'- the other,

a retaining ring rotatably mounted onone of said members for holding therollers between said members, means for rotating one of said members inone direction at a given rate of speed and means for rotating the otherof said members in an opposite direction at a dilferent rate of speedand simultaneouslyimparting lateral move ment thereto.

7. In a grinding machine, a frame, upper and lower spaced niemberscarried by the frame, upon the adjacent faces of which the objects to'be ground are disposed, means for rotatin said members in oppositedirections at different ates of speed, a retaining member forsaidobjects, a vei'tically adjustable ring carried by one of said spacedmembers and a plurality of supporting and guiding rollers for saidretaining member carried bysaid vertically adjustable ring.

8. In a grinding machine, a frame, upper and lower spaced memberscarried by the frame, upon the adj acent-faces ofwhich the objectstobeground are disposed, means for at different rates of speed,

- retaining member and 'ing member.

rotating said members in opposite directions a ret ining inemher forsaid objects, a vertically adjustable ring carried by one of said spacedmembers, a p urality of supporting and guiding r011: ers for saidretaining member carried by said vertically adjustable ring and meansfor locking said ring against accidental displacement.

' 9. In a grinding machine, a. frame, upper and lower spaced memberscarried by the frame, upon the ad'acent faces of which the objects to begroun are disposed, means for rotating said members in oppositedirections, a retaining member for said objects,

a ring adjustable upon one of said-spaced members, a plurality ofrollers disposed upon said ring and adapted to support said flanges uponthe rollers arranged to prevent accidental displacement of saidretaining member.

10. In a grinding machine, a frame, upper and lower spaced memberscarried by the frame, upon the adjacent faces of which the objects to beground are disposed, means for rotating said members-in opposite di-,

rectionsat different rates of speed, a retainin member forsaid objects,a plurality-of r0 lers for supporting and guiding said retaining memberand eccentrically mounted supports for said rollers adap ed to berotated for the purpose of adjusting the height of the rollers to raiseor lower said retain- 11., In a grinding machine, a frame, up per andlower spaced members carried by the frame, upon the adj acent faces ofwhich the objects to be ground are disposed, means for rota'tin saidmembersin opposite directions at di erent rates of speed, a retainingmember for said objects, a plurality of rollers for supporting andguiding said retaining member, anti-friction bearings for said which theobjects to rollers and aplurality of shafts for supporting saidanti-friction bearings connected with one of said spacedmembers.

12. In .a grinding machine, a frame, upper and lower spaced memberscarried by the frame, upon the adjacent faces of which rollers forsupporting. and guiding said retaining member, anti-frictionbearingsvfor said rollers, a plurality of crank pins upon which saidanti-friction bearings are journaled and means for clamping said crankpins in different positions of adjustment upon one of said spacedmembers.

13. In a grinding machine, a frame, upper+and-lower spaced members.carried by the frame, upo-n,the adjacent faces of be ground are disposed, means for rotating-saidmembers in opposite directions atdifferent rates of speed, a retaining member for said objects, aplurality of rollers for supporting and guiding said retaining member,anti-fric-v tion bearings positioned within said rollers, crank-shaftsupon which said bearings are journaled, said crank shafts beingrotatably connected with one of said spaced members,

a screw threaded .in-the outer end of each of said crankshafts and aplate held by each of said screws to prevent displacement of saidbearings. 14:. In a grinding machine, a frame, a grinding member and awork carrying member carried by said frame, a, work re taining ringretaining ring from said work carrying member comprising a series .ofrollers arranged exteriorly of said member, and means for varying theposition of said ring relative to said members.

15. In a grinding machine, a frame, a grinding member and a workcarrying member carried by said frame, a work relUO taining ring, and aring adjustably mounted on said work carryingumember having a pluralityof supporting and guiding rollers for holding, said retaining ring invarious positions of adjustment relative to said members.

said retaining ring whereby the frame, an upper roller supportingmember, a retaining ring having a series o-f openings for receivingrollers to be ground and having a portion between said members, a ringadjustably mountedin said supporting member, and a series of rollersindividually adjustably mounted on said latter ring for supporting andguiding said retaining ring.

18. In a grinding machine, a frame, a grinding member mounted therein, awork supporting ring opposite said grinding member, and means formount-ing said ring on said frame to revolve on an axis eccentric tosaid ring.

19. In a grinding machine, a frame, a grinding member carried thereby, awork supporting ring opposite said grinding member, means for revolvablymounting said ring on an axis eccentric thereto, and a retaining ringcarried by said supporting ring having apertures for receiving the work.

20. In a roller grinding machine, a frame, a grinding member rotatably'mounted thereon, a. roller supporting ring opposite said grindingmember, means formo-unting saidring to revolve on an axis displaced fromthe center of the ring and in alinegrinding member, a lower ment withthe axis of rotation ofsaid W grinding member, and a freely rotatableroller retaining ring carried by said supporting ring.

21. In a roller grinding machine, a grinding ring rotatably mounted aroller supporting rin adjacent the grinding face of said grin ing ring,means for mounting said roller supporting ring to revolve on an axisdisplaced from the center thereof but coincident tation of said grindingring, a roller retaining ring supported by said roller sup porting ringto be freelyrot-atable thereon, and means whereby said grinding ring anda frame,

said roller supporting ring may be rotated 45 in opposite directions.

22. In a grinding machine, a frame,'a grinding member mounted thereon, abase ring upon which the work is superimposed mounted opposite said andmeans for mounting the base ring to rotate "about an axis which revolvesin a path eccentric to the axis of rotation of the grinder.

In testimony whereof, I aflix my signa- 55 ture.

HANS Lu'rz.

thereon, $5

with the axis of ro- 4&0

grinding member, 50 4

